Chair iron



May 25 1926.

C. J. TRAVERS CHAIR IRON Filed May 17, 1924 Patented May 2 1926'UiNiWEiB 1,586,166 rarest errata.

CHARLES J. mRAvEns, or roar wasnmeron, sconsin, ,nssrenon no e nsonMANUFACTURING too, or roar wns rr ve'ro v, Wisconsin.

see J R N' r t p i lsd 1324. Serial No. 714,036. a

This invention relates to chair irons.

Objectsof this invention are to provide a chair iron which is ofextremely compact construction, which permits the extension of thespindle upwardly beyond .the tension screw, and whichpermitstheconstruction of a chair without requir ng an excessive heightor spacebetween the supporting legs lan fi l ai s at- Furtherobjects are torovidea chair iron which may be formed primarily from stamped sheetmaterial, which is of a .very strong and rigid construction, which isdeqido fi'e il P an W 1 y[b pro'ducedby ordinary machine shop met bds- TAn embodimentof theinvention is shown in theaccompanying drawings, inii/11ml]?- F gur l s a v r ca c n i th oug h h i .i ro su ne corre-.sponding toa section on the line 11 of vi igu fl Figure 2 isaplan viewpartlybroken away of the structure shown; in Figure 1.

Figure 3 is a sectional view on the line 3 .3, o,f Figure 1 with thespring and the inn b aring Wa h r movede uresii' a deta of e em es scrand adjusting nutdetached from the rest of the separa es- The chair ironcompr ses thepa r of supporting channelmembers 1 adapted forattaclnrient to the chainseat. These channel members are riveted toprojecting ears. of a saddle piece 2, the ears of such saddle piece beng slig tly r ewed, a s ow i Figu Shto receive the channel supports 1ofthe :chairseat. flhis saddle member-is provided with downwardly turnedlugs 3 throngh which the pintle rod 4: passes, such pintle rodbeingreceived in the upwardly extending side' 'walls 5 ofthe lower bracemember. The brace includes the lower bracememher previouslymentionedwhich is provided with a transverse bottom portion 6 aper .tured toreceive the-threaded supporting spindle? and also comprising an upperliracennember 8 which is apertured, and receives the upper endi" of-thespindle, such upper end being riveted to the transverse upper brace-member 8. 'This ripper brace member is plf vitled with downwardly ex-,tonding earsfi and it is to be noted from Figure ,3 that these carsand,the corresponding walls of the lower-brace member are angularlyarranged and are securely riveted together. It is to be noted in thisconnection that the brace engages the spindie '2' at widely spacedpoints and thus'prorides. the maximum security of attachment between theupper portion of the structure and the spindle, and prevents twisting orbreaking of such portion from the spindle. In connection with the'lowerbrace member, it is to be noted from reference 2 to Figure 1 that suchlower brace member is provided with aforward upturnedportion "6, (seeFigure 1) which acts as a strength- -ming reenforcing flange forsuch'ineinber and increases the rigidity and strength of the structure.i

nThe upwardly extending walls of the lower brace member are providedwith raised portions 10 which :form rear stops against which thesaddle 2is adapted to strike, and are further provided with raised forward ends11 against which the saddle bears when in normal position, as shown inFigure 1, thus constitutingrear and forward stops, respectively. i

A downwardly extending arm 12 of channel shape is carried by the saddlemember 2, and is preferably provided with a rear wall contacting withsuch saddle member, as shown Figure 1, and withside walls 13 which arenotched, as indicated at 14, to receivethe pintle pin 4. These sidewalls continue upwardly and forwardly and are of substantiallytriangular formation. They are provided with outwardlyturned ears 15which are secured by rivets or sriitable means to the saddle 2, as shownin Figure 2. The rear wallpof the ,arm 12 is provided with outwardlypressed protuberances or ridges 16, as shown in dotted lines in Figure1, and, as shownin section in Figure '4, and such arm is apertured, asindicated at 17 in Figure 1, to receive ,thetapered portions of theflanged .bearingwasher 18, *such ridges 16 hearing against the flange ofthe washer 18 and forming in eflect line contacts with such washer. Thetapered portion of the washer cooperates with the aper- :ture 17 in thearm 12 and aids in centering such washer with reference to the aperture.A tension bolt 19 is provided with a head 20 at its rear end whichreceives the spring washer or bearing member 21. A second bearing washer22 isprovided and is positioned in contact with the spindle T, asshlooin Figure 1. Between these washers a compression spring 23 positioned.In order to accommodate the tension bolt 19 and also to securecompactness of the device, an aperture 2a is formed in the upper portionof the spindle 7, such aperture being materially larger than the tensionbolt 19 to permit ready tilting of the device without binding of thebolt within the aperture. The outer end of the tension bolt. 19 isthreaded and receives the knurled adjusting nut 25, the inner end oi?such nut directly contacting with the bearing washer 18 of the tensionbolt.

It is to be particularly noted that it has heretofore been the practiceto provide bearing washers in place oi the member 13 which were providedwith projections adapted to contact with an arm extending downwardlyfrom the saddle in order to permit proper working relative inovcn'ient.it irequently happened that these washers were incorrectly positionedwith binding or defective functioning. However, by providing the ridges16 (see Figures 1 and in the arm 12), and by providing the bearingwasher with a fiat flange, as indicated at 18, this defeet is overcomeand construction is pro- *ided which will always function correctlyirrespective of the setting of the washer flange 18. In other words,this flat flange may be turned about the axis of the bolt into anyposition without aliecting its coope ative functioning with the wavy orridge portion 16. Also the portion 17 of the bearing washer aids incorrectly centering such bearing washer.

It is to be noted that the widely spaced points of bearing or the bracewhich sup ports the entire load from the seat is secured withoutunnecessarily elongating the structure, and it is to be particularlynoted that the tension bolt and spring and the associated parts arepositioned between the upper and lower portions of the brace, and thatthe tension bolt passes directly through the spindle. This constructionhas the highly practical and desirable effect of providing a very strongconnection between the bracing member and the spindle and of provid ingthe long sought for compactness o't construction.

It will thus be seen that a chair iron has been provided which is ofstrong formation, which is very compact and which may be simply andcheaply manufactured.

Although the invention has been described .in considerable detail, it isto be understood that the invent-ion may be variously embodied and is,therefore, to be limited only as claimed.

I claim:

1. A chair iron comprising a saddle adapted to support a seat, a bracepivotally secured to said saddle, a main supporting spindle, said braceengaging said spindle at widely spaced points, an arm secured to saidsaddle and extending downwardly in front of said spindle, a tension boltheld by said arm and passing through said spindle, and a spring urgingsaid tension bolt rearwardly.

2. A chair iron comprising a saddle adapted to support a seat, a bracepivotally secured to said saddle, a main supporting spindle, said braceengaging said spiiidle at widely spaced points, an arm secured to saidsaddle and extending downwardly in front of said spindle, a tension boltcarried by said arm and passing through said spindle and through saidbrace, and a spring mounted rearwardly of said spindle and urging saidtension bolt rearwardly.

3. A chair iron comprising a seat supporting saddle, a main spindlehaving an aperture adjacent its upper end, a brace pivotally supportingsaid saddle, and engaging said spindle at spaced points above and belowsaid aperture, a tension bolt operatively connected to said saddle andpassing through said aperture, and a spring associated with said boltand having a hearing portion engaging the rear side of said mainspindle.

4. A chair iron comprising a saddle, a main spindle, a brace pivotallysupporting said saddle and engaging said spindle at spaced points, achannel shaped sheet metal arm projecting downwardly from said saddleand having an aperture and a pair of outwardly pressed ridges adjacentsaid aperture, a tension bolt passing through said spindle, a springmounted rearwardly of said spindle and connected to the rear portion ofsaid bolt, and means adjustabl carried by the forward portion of said b0t and engaging said ridges.

5. A chair iron comprising a pair of channel supporting members, asaddle secured to said members, a brace pivotally attached to saidsaddle, a spindle enga ing said brace at widely spaced points and iavingan aperture extending through such spindle intermediate such points, achannel shaped arm attached to said saddle and extending downwardly infront of said spindle, a tension bolt having adjustable means bearingagainst said arm and passing through the aperture in said spindle, aspring surrounding the rear portion of said bolt, and bearing 1nembersfor said spring carried by said bolt, one of said bearing membersengaging the outer end of said bolt and the other of said bearingmembers contacting directly with said spindle.

6. A. chair iron comprising a saddle, a main spindle, a brace pivotallysupporting said saddle and engaging said spindle at spaced points, asheet metal arm secured to said saddle and extending downwardly in frontof said spindle, said sheet metal arm having a pair of outwardly pressedridges and an aperture therebetween, a spring urged tension bolt passingthrough said aperture, and a bearing washer carried by said bolt andhaving a flat flange contacting with said ridges, whereby free pivotalrelative motion between said flange and said arm is permittedirrespective of the position of said flange.

7. A chair iron comprising a saddle, a main spindle, a brace pivotallysupporting said saddle and engaging said spindle at spaced points, anarm secured to said saddle and extending downwardly and provided withspaced ridges and an aperture therebetween, a spring urged tension boltpassing through said aperture, and a bearing washer carried by said boltand having a flat flange contacting with said ridges, whereby freepivotal relative motion between said flange and said arm is permittedirrespective of the position of said flange 8. A chair iron comprising apair of channel supporting members, a saddle secured to said members, abrace pivotally attached to said saddle and having an upper plate and abottom plate, a spindle having its upper end secured to said upper plateand having an intermediate portion passing through said lower plate,said spindle having an aperture between said plates, a channel shapedarm attached to said saddle and extending downwardly in front of saidspindle, a tension bolt having adjustable means bearing against said armand passlng through the aperture in said spindle, and a springsurrounding the rear portion of said bolt and bearing against saidspindle.

In testimony that I claim the foregoing I have hereunto set my hand atPort Washington, in the county of Ozaukee and State of Wisconsin.

CHARLES J. TRAVERS.

